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Targeting steroid receptor co-activator 3 sensitizes myeloma cell to proteasome inhibitor treatment through NSD2-mediated phase separation and chromatin remodeling [ChIP-Seq]

ABSTRACT: Functional crosstalk between histone modifications and chromatin remodeling has emerged as a key regulatory mode of transcriptional control during cell fate decisions, but the underlying mechanisms are not fully understood. Here we demonstrate that NSD2/SRC-3 complex coordinates histone H3 lysine 36 dimethylation (H3K36me2) and transcriptional elongation factor Pol II to regulate chromatin dynamic and gene transcription during myeloma resistant to bortezomib. Mechanistically, NSD2 can interact with SRC-3, its SET domain is responsible to H3K36me2 to enhance the transcriptional activity of SRC-3 target gene. The inhibitor of SRC-3, SI-2, can impaired the interaction between NSD2 and SRC-3, caused the distribution of H3K36me2 on the genome-wide.

ORGANISM(S): Homo sapiens

PROVIDER: GSE156870 | GEO | 2020/08/26

REPOSITORIES: GEO

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Targeting steroid receptor co-activator 3 sensitizes myeloma cell to proteasome inhibitor treatment through NSD2-mediated phase separation and chromatin remodeling [RNA-Seq]

Project description:Functional crosstalk between histone modifications and chromatin remodeling has emerged as a key regulatory mode of transcriptional control during cell fate decisions, but the underlying mechanisms are not fully understood. Here we demonstrate that some drug resistant genes were activated during myeloma resistant to bortezomib. Mechanistically, NSD2 can interact with SRC-3, its SET domain is responsible to H3K36me2 to enhance the transcriptional activity of SRC-3 target gene. The inhibitor of SRC-3, SI-2, can impaired the interaction between NSD2 and SRC-3, caused the distribution of H3K36me2 changed on the genome-wide, and inhibit the transcription of those drug resistant genes.

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Project description:NSD2 is a histone methyltransferase that specifically dimethylates histone H3 lysine 36 (H3K36me2), a modification associated with gene activation. Dramatic overexpression of NSD2 in t(4;14) multiple myeloma (MM) and an activating mutation of NSD2 discovered in acute lymphoblastic leukemia (ALL) are significantly associated with altered gene activation, transcription and DNA damage repair. The partner proteins through which NSD2 may influence critical cellular processes remain poorly defined. In this study, we utilized proximity-based labelling (BioID) combined with label-free quantitative mass spectrometry to identify high confidence NSD2 interacting partners in MM cells.

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NSD2 links dimethylation of histone H3 at lysine 36 to oncogenic programming [ChIP]

Project description:NSD2 (also named MMSET and WHSC1) is a histone lysine methyltransferase that is implicated in diverse diseases and commonly overexpressed in multiple myeloma due to a recurrent t(4;14) chromosomal translocation. However, the precise catalytic activity of NSD2 is obscure, preventing progress in understanding how this enzyme influences chromatin biology and myeloma pathogenesis. Here we show that dimethylation of histone H3 at lysine 36 (H3K36me2) is the principal chromatin-regulatory activity of NSD2. Catalysis of H3K36me2 by NSD2 is sufficient for gene activation. In t(4;14)-positive myeloma cells, the normal genome-wide and gene-specific distribution of H3K36me2 is obliterated, creating a chromatin landscape that selects for a transcription profile favorable for myelomagenesis. Catalytically active NSD2 confers xenograft tumor formation and invasion capacity upon t(4;14)-negative cells and NSD2 promotes oncogenic transformation of primary cells in an H3K36me2-dependent manner. Together our findings establish H3K36me2 as the primary product generated by NSD2, and demonstrate that genomic disorganization of this canonical chromatin mark initiates oncogenic programming. ChIP sequencing of H3K36me2 ChIP DNA from KMS11 and TKO2 cells using Illumina Solexa Genome Analyzer II single end sequencing protocol. The experiment contains two biological replicates of H3K36me2 ChIP DNA and input materials from KMS11 and TKO2 cells.

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Project description:NSD2 (also named MMSET and WHSC1) is a histone lysine methyltransferase that is implicated in diverse diseases and commonly overexpressed in multiple myeloma due to a recurrent t(4;14) chromosomal translocation. However, the precise catalytic activity of NSD2 is obscure, preventing progress in understanding how this enzyme influences chromatin biology and myeloma pathogenesis. Here we show that dimethylation of histone H3 at lysine 36 (H3K36me2) is the principal chromatin-regulatory activity of NSD2. Catalysis of H3K36me2 by NSD2 is sufficient for gene activation. In t(4;14)-positive myeloma cells, the normal genome-wide and gene-specific distribution of H3K36me2 is obliterated, creating a chromatin landscape that selects for a transcription profile favorable for myelomagenesis. Catalytically active NSD2 confers xenograft tumor formation and invasion capacity upon t(4;14)-negative cells and NSD2 promotes oncogenic transformation of primary cells in an H3K36me2-dependent manner. Together our findings establish H3K36me2 as the primary product generated by NSD2, and demonstrate that genomic disorganization of this canonical chromatin mark initiates oncogenic programming. Genome-wide expression profiling of KMS11 cells stably transduced with control vector in comparison to two independent shRNAs against NSD2. Each cell line is tested in duplicate.

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NSD2 links dimethylation of histone H3 at lysine 36 to oncogenic programming [Transduction]

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